Grid

A grid is a graphical division of units. In Second Life, the grid is the general term for the entire world. More specifically, the grid is the simulators visible on the world map and, even more specifically, the grid are the servers which run SL and have a symbolic relationship to the world map, with one server supporting one sim (though multiple sims can and are run on the same physical server hardware).

Da Boom was the first sim on the grid. Its SW (southwest) corner is at <1000,1000,0> sim coordinates, or <256000,256000,0> global coordinatemeters. Some users refer to Da Boom as the center of the grid, but there's no technical reason to do so.